Angels' top starter Garrett Richards needs Tommy John surgery

ANAHEIM, CA - SEPTEMBER 25: Garrett Richards #43 of the Los Angeles Angels of Anaheim reacts during the sixth inning of the game against the Seattle Mariners at Angel Stadium of Anaheim on September 25, 2015 in Anaheim, California. (Photo by Matt Brown/Angels Baseball LP/Getty Images)

Los Angeles Angels right-hander Garrett Richards has a torn ulnar collateral ligament in his throwing elbow is expected to have season-ending Tommy John surgery, Yahoo Sports first reported Friday.